xxx

  public List<string> xx(string text)
        {
            text += "";
            char[] index_c = { ' ', ',', '>', '<', ')', '(' };
            string[] split_c2 = { "@" };
            string[] lines = text.Split(split_c2, StringSplitOptions.RemoveEmptyEntries);
            List<string> paras = new List<string>();
            for (int i = 1; i < lines.Length;i++ )
            {
                string temp = lines[i].Substring(0, lines[i].IndexOfAny(index_c));
                if (paras.IndexOf(temp) == -1)
                {
                    paras.Add(temp);
                }
            }
            return paras;
        }